Calculating-machine.



- @CMQ W T. CARROLL.

GALGULATING MACHINE. APPLICATION FILED AU(}.13. 1900. n 1,'1 18,103.A Patented N0v.24, 1914.

- .I B SHEETS-SHEET 1.

' v ao Pl, 7 y waa/fa m ,VMW

l T. CARROLL. GALCULATING MACHINE. APPLICATION rILED 106.13, woo.

Patented Nov. 24, 1914.

T. CARROLL.

GALCULATING MACHINE.

vAPPLIOAfEION FILED AUG. 13, 1900.

.1,1 18,103. l l Patented Nov.24,1914

9 SHEETS-'SHEET 3.

T. CARROLL.

CLCULATING MACHINE.

APPLIoA'rIoN FILED AUG. x3, 1900.

Patented Nov. 24, 1914.

9 SHEETS-S HELT '1.

@xiti/gewas T. CARROLL.

CALCULATING MACHINE.

APPLmATIoN FILED AUG* 1al 1900.

Patented Nov. 24, 1914.

9 SHBETS-SHEET 5.

T. CARROLL. CALGULATING MACHINE. APPLICATION PIL-ED`AUG-13, 1900.

Patented Nov, 24, 1914.

' -sHBET e,

v9 SHEETS T. CARROLL.

CALCULATING MACHINL.

AfPLIcATIoN FILED 11110.13, 1900.

Patented Nov.'24,1914.

9 SHEETS-SHEET 7.

T. CARROLL.

, CALGULATING MACHINE. -APPLIQATION FILED AUG. 1s. moo.

1, 1 1 8,1 03, Patented Nov. 24, 1914 9 SHEETS -SHEET B.

Y. l -I Witwe/waa Y v l I7 Mar/M UNITED STATES PATENT oEETCE.

THOMAS CARROLL, OF DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 THE NATIONAL CASH REGISTER COMPANY, OF DAYTON, OHIO. A CORPORATION 0F OHIO,

(INCORPORATED IN 1906.)

CALCULATING-MACHINE.

is the provision 'of an'improv'ed mechanism which will print in detail each amount registered and when so desired willprint a grand total of all thev amountsregistered.:v

A further'object is to provide improved mechanism for both printinga detailfof each 'amount and registering the same'on a totalizing counter. .V

lnlthev accompanying.' :drawings forming part of this'v specification, Figure 1 is artop plan. view of the machine embodying my ventin with its-cabinet removed. v F ig.2 isv a vertical longitudinal section through Y'the same on the line'm--m' of Fig. 1. Fig. .3

is a detail sideelevation, partly in section,

of the mechanism for-setting the printing segments for printing the grand total of the amounts registered. Fig. 4 is an enlarged dtail side elevation, partly lin section, of the devices for throwing out the counter. Fig. 5 is Aan enlarged detail perspective view of one of the segmental racks and transfer devices. Fig. 6 is 'an enlarged detail perspective view of the transfer operating levers. Fig. 7 is an enlarged detail perspective view of the turn to zero lever und coperating devices. Fig. 8 is a detail top plan view of a portion of the driving frame and two of the counter operating bars. Fig. 9 is a detail top plan view of the inking ribbon feeding devices; one of the spools being omitted to disclose its operating devices. Fig. 10 is an enlarged detail perspective view of the shifting slide for said feeding device. Fig. 11 is an enlarged detail side elevation of the release lever and the devices for setting the machine for repeating a certain operation. Fig. 12 is an enlarged detail side elevation of the device for compelling a full stroke of the operating lever. Fig. 13 is an enlarged detail side elevation of oneof the locking pawls for preventing overthrow. Fig. 14 is an enlarged Specification ot Letters Patent.

Patented Nov. 24, 1914.

' ppiicauon ined August 13, 1900. seriaino. 26,667.

detail perspective viewv of' the operating bars, printing segments and connecting devices. Fig. l5 is an'enlargeddetail perspective view of one of the operating bars, its

segmental rack Y and connecting devices. Fig. .16 is an enlargedadetail perspective .view of one of the counterwheels `and its transfer devices. Fig. 17 is an enlarged de- V-tailf'perspective view of the 'paper -feeding rolle'rs'and cooperating parts. .'Fig. 18 is anv enlarged detail perspective view of two of the keys and v theirv .latch .:.plate. Fig.

rated. Fig. 22 is an enlarged -detail perspective view of the locking-yoke .forfoper- .ating or driven bars. Fig. 23 is an .enlarged fdetail perspective `view.cfg-:the totalizing de-v l vices for the printer lshown in elevation in Fig. 3.- Fig 24 is an 'enlarged-'detail perspective view of the totalizing plunger, its `latch and tri for said 1atch.'-.Fig. 25 is an enlarged etail perspective view of .one of the throwing levers for bringing the racks .-19 is a detail bottom plan View ofone of said latch plates. Figi. 20. is an enlarged detail `perspective :view of the devices -for effecting the printing of the zeros. Fig. 21 is a. v view similar to Fig. 5 with the -parts sepainto connection with and disconnecting them from thecounter pinions.' Fig. 26 is an enlar ed detail perspective .view of. one of the roc Y shafts with the cams and lugs for shifting the same laterally. Fig. 27 is a detail section through one of the ribbon spools and its tension spring. .Fig 28 is an enla rged detail perspective View of part of the driving frame, and Fig. 29 is a detail side elevation of the feeding rollers and coperating parts.

In the aforesaid drawings 1 indicates the frame of the machine; 2` the amount keys; 3 the totalizing key; 4 the turn to zero lever, and :,'1 the operating handle or lever.

' ln general terms the construction may be said to consist of a series of amount keys, 2, which. when operated set connecting pawls 6 mounted on a movable frame, which frame always has thesame degree of move-v ioo Each of the keys 2 comprises a numbered head or button and a shank 10. The shanks pass through spaced apertured plates 11 and 12, and are forced up into their normal positions by coil springs 13 which surround said Shanks and bear withf-their opposite ends against said plate 12 and pins 14 mounted on the shanks (see Fig. 2).. Eachof said Shanks beveled at its lower end and is also formed near said lower end with a notch 15 and a-lockingshoulder 16. The keys are arranged in ninepbanksof nine keys each' so that the notches 15 of eachtransverse row n will all lie in the-same lateral plane Vto re- 15 ,ceive one of a series of transverse plates 17 see Fig. 18) which-are secured to the plate 12. 'The edges ofthese plates engage the dat sidessof the notches and thus prevent the Shanks from turning in their guiding plates. The lower beveled ends of the Shanks of the keys of each bank-coact with spaced noses-18 formed on one-of-a series of.latch "bars 19l mounted on the under side of the plate-12 (see Fig. 19).v Each of thesebars is formed withelongated'slots-20 through -which are passed screws 21'for securing said bar movably the plate 12. Each-of the bars lis'he'ld in its normal-.position with its noses bearing-.against the?. beveled ends' of thesame'longitudinally untilthe nose snaps holds the key ingits depressed position until the ban-is' subsequently 'moved longitudinallyV to release it as hereinafter described.

Mounted just Vbelow the key board is an oscillating driving .frame 23 which oomrises transverse end rods 211 and spaced ongitudinal bars 25 v.connecting the same. The rods 24 are mounted in the upper ends of supporting bars'26 and 26* which in turn are pivotally mounted at their lower. ends 1 d upon the sides of the frame. The ends of the rods 24 project into segmental vslots 27 Vformed in then-'frame (see Fig. 2) `whereby the frame 23 is braced in its movements. Eachof the aforesaid bars 25 is formed with a-series of spaced lugs 28 (see Fig. 3) upon which are pivoted the connecting pawls 6. 'Each' of said bars is further provided with a longitudinally extending coil s ring` 30 secured at its o psite ends to sai bar and resting u `nj e vtops of the lugs 28 as shown in. ig. 8. The yotlce ofthis s in each instance. is .toxhold the rear en o all of the lateliing pawls of the particular bar .60 to which said sprixzigbelongs,A in elevated inoperative ositions said dpavvls carrying pins 31 which rest upon sai ring for this purpose. The rear ends of t e awls exceptin the rearmost in each ank are vfox-in with lugs 6 (see Figs. 8 and 13) :bars 7 one of whiclris provided for each the key Shanks by* a coil'-springg-QZ. which..VA connects'it to '.saidsfplate. "When'fne of the" keysis depressedits. lower. beveled end forces; its respective nose 18 and bar 19 carryingfpawlfwillfpass under the -hook 34-but .will

behindzthe shouldelfi of theshank and thus a of each hook 34 is to prevent the return of tudinal motion upon each operation of the pin 6b which contacts with a vertical exten- 70 sion of its bar 25 to hold it in its normal p0- sition. `The forward ends of the pawls,are provided with lugs 33 whereby when one of said pawls is depressed by the depression of its respective key which is located just l above it, its lug is brought into the same plane with one of a series of graduated operating hooks 31 (see Figs. 3 and 13); These hooks are formed on the slidable operating bank. These bars 7 are mounted and guided at their forward ends in suitable grooves formed in a cross bar 37 .of the frame and are Aformed at their rear ends with guiding slots 38 through which passes a transverse guiding and supporting rod 39. i

It willbeseen by reference'to Fig. 3 of thedrawing that the hooks 34 are of dif-lerent lengths and-have their operating ends located different .distances from the lugs33 of the connecting pawls 6 according to the Y value of the key which the pawl'represents. Thus when one of saidconnecting pawls is depressed lby. its key and the frame 23 Ymoved longitudinally the Vlug 33' of said notmove the ba'r' 7 carrying said hook until the lug reaches the end or operating wall of the hook. The office-of the extended portion iwhich is holding it down.

The aforesaid frame 23 receives longimachine through the medium of its rear suppoi-'ting bars 26a each of which is positively rocked or oscillated upon the movement of the lhandle 5. This oscillation is effected by oscillating disks 383L fast to a rock shaft 29a 11 and formed with cam slots l0 into which project anti-friction rollers 41 mounted on said rear bars 26- (see Fig. 3). The said shaft 392l receives its motion directly froml the lcrank handle 5 which is fast to the exf tending end of the same. The shaft is held in its normal position with the operating handle extending upward by a coil spring 42 which is connected to the main frame and to an arm 43 fast-to the shaft 39 as shown in F i g. 2. Thus when the handle is drawn forward the spring l2 is put under tension to assist in the return of the handle.

The longitudinal movement of the plates 19 to eflectthe release of the keys takes place after the lugs 33 have passed under the extended portions of the hooks 34 and is accomplished hy pendent rods 44 mounted on said plates. These rods are arranged so as to be engaged and forced rearward by a i of their springs to release any of the keys.

that may have been set.'-` .VVhen the machine is -set for ordinary operation the pawls43 strike the rod '47 upon each movement of the frame 23 but as vit is sometimes desirable gto set the machine to repeator successively idd certain similar amounts without 0paerating the amountkeys but once, I provide means for allowing saidpawls to engage the rod 47 onlyafter a certain predetermined number of operations of the machine. To etect-.thisresulte'ach pawl 48- is formed with anose 49 which normali reciprocates in a notch 50 formed in one o two disks -51 uponv which said pawl rests. lVhen this disk is Arotated the wall of the notch 50 engages thenose 49 andelevates thersame so that the end ofthe in 'which twi not strikethe rod 47 when it is-Inoved longitudinallygfhe disks 51 are fast to j al shaft 52 which carries a bevel inionzg. This'pinion meshes with-a simiar pinion 54A mounted on the lower end of a sett-lngsha'ft 55fwhich isl suitably journaled in .the main frame. The upper end of this -shaftv as shown'in Figs. 1 and 2 is provided with 'a thumb knob 56 having a graduated numbered-disk which is arranged to play under an indicatingnger 57. mounted on the frame, to indicate to just what extent the thumb knob is turned so that the desired number of repeated operations may be secured. "henthe' disks 51 are in the position vshown in Fig. 2 the keys will he released after the Iirst operation of the handle 5 as said disks and the noses 49 of the operating pawls are in operative position. Then it is desired to cause the machine'to repeat an operation a .certain number of times the thumb knobr56 is turned in the di'- rection indicated by the arrow until the pointer 57 points to the desired number. This operation causes the disks 51 to be so rotated that the noses 49 pass ont of the notches .i0 and ride upon the periphery of said disks which so elevates thel pawls 48 that they willnot strike the bar 47 when reciprocatcd. The disks are turned toward normal position step hy step as the machine is pcrated until the noses 49 again drop into the notches :'10 when the keys will he released and any further registration prevented. 'ihis step by step movement of the disks is eli'rctcd lhrough the mediumnvof the shaft in the following manner. Said shaft is provided neai` its right hand end with a mutilated ratchet wheel 58 (sce Fig,

'- ll) which is adapted to be engaged and pawl, 48` is lifted to a positionV movedfforward one tooth at a. time by a spring drawn pawl 59 mounted fonone of the pawls 48. When the shaft 52 1s turned bythe thumb knob 56 as above described the pawl 59 rides over all theteeth of the ratchet wheel 58 except a number equal to thenumber 4of times it-is desired to repeat -any certain operation. Upon each operation .-.of the handle 5 the pawl 59 is reciprocated to turn Vthe mutilated ratchet wheelA one tooth so that when the machinehas been operated the Adesired number of, times the movement of the ratchet wheel will cease as the pawl will simply ride over the mutilated portion of the same without turning it. In order to prevent any -backward rotation of the ratchet wheel 58 I provide a spring drawn pawl G0 vwhich is suitablymounted toengage the'teeth of the same. r[he above` described devices provide lfor releasingthe-f" 'keys upon the operation ofthe-machinebut as mistakes are sometimes .made in depressing the wrong keys it is necessary to provide" some means for-releasing the keys-:without operating the machine.I To accomplish this result I provide the yoke 46 with aneirtension or operating lever 61l which projects I through a suitable slot formed inv thetopof the cabinet or casing ofthe lmachine-,j It will readily be seen that by rocking thisA lever the yoke will also beroeked and vthus release the keys in the manner'before; de

scribed.`

It will be observed from the above -description just how the bars 7 I:fre moved longitudinally aceordingvto the value 0f the key operated and I will now describe how these movements are transmitted to the printing and registering devices. Each of the bars 7 is formed near its rear end with a slotted lug 62 (see Figs. 14 and 15). The lug 62 of the middle bar is arranged to receive a pin 63 mounted on an arm 64 of the middle type segment 8 which is journaled upon a transverse shaft 66. The movement of the bar 7 will thus move the type segment correspondingly to bring the A proper type on its periphery into printing position. 'l'he two type segments to each side of the middle segment are connected to their respective bars 7 in a siinilrr manner to the middle segment with the exception that the connecting pins (i3 are longer. The hai-sii' ofcourse are in alnement with their respective banks of keys and as the type segments which le close together are necessarily out of alinement therewith means must he provided for spanning or bridging the distance between the several oars and their respective segments. This means comprises a series of levers 6T pivoted on the shaft (i6 and provided with pins G8 which engage the respective ugs G2. laeh of these levers is provided with a laterallv extending bar 69 which connects it rigidly with its respective type segment sothat the latter Willmove therewith.

Coperating with the type segments' is an impression platen-70w`hieh is set in a Vyolie 71 j ournaled upon a shaft 99 as better shown in Figs. 1 and 29. The yoke is rocked upon each operation of the machine by link bars 71, `which are pivotally connected' to the 1s norma'lly draivi-lipivard against la' 'pin'- 78 by ja." coil spring-"79' 'whi'cli 'onneets .itl'witb the mainframe. j 'f l' vvThe paper' strip 80 passesffrbm'a supply roller `81'` up 'between and pressure rollers`82iuand`v83 respeetively. The upper and 82 is"lnolinteclflgin-'jarotaryv shaftil (sef ,11`ig.17) which `iirnaled in' th'main frameand is provid `:'a'tirieend...-

vwith a ratchet wheel Sby means of whichit .isr'xjtatedJ Tbisfvheel is engaged by a pawl'86 mounted'on the yoke 71 and-'is thusv Amoved one notchwupon each oscillation of Y said yoke. The pawl 86isprovided with a endant extensionS'( and angular extension 88,1 Vtlawezg,., fornier"operati'ng with a' springpressedf bellcranlclo'cking pawl 89 whilethelatter acts as a guide for said pawl 86 to hold it inthe proper positionin relation to the ratchet wheel 85. The spring pressure upon this pawl 89 normally causes it to engage the pawl 86 and hold it 'in engagement with the ratchet Wheel 85. Upon the initial movement of the ydlte 71 thep'awl 86 is so moved as to allow thespawl 89 to erigage the ratchet wheel said pawl normally .being 4in the disengaged position vshown vin F ig. 17. The pawl 86 acts as a feeding pawl-and the-.pawl 89 as a retaining pawl for-ftheA said ratchet wheel.V As it is sometimes de'sirable to turn the vfeeding roller 82 baclrward in order to feed 'the paper strip backward Asome`meansmust be-.f-'p`ro-- vided Vfor disengaging -the pawls|- 86 and .89 .from the ratchet wheel" 85. This means consists :of'a sleeve"90floosely `mounted on the vprotruding"end4 4"of the shaft Stand -formed withv av thumb nut 91 whereby it 'may be rotated.` sleeve is also formed with adiagon'al or cam `slot 92 and has its. inner end 'beveled'as at 93 so that K 'vehenfsaid-sleeve is'forced inward this bevdisengageit also from A'the ratchet. The ex- 'tended endgof the Ashaft 84 is provided with a pin 94 which projects into the slot 92. The sleeve 90 is .normally held in its outer posi- 75 tion by a coil spring mounted therein and bearing with its opposite endslagainst thc nut 91 and the end of the shaft S4. It will be seen by reference to Figs. 1 and 17 of the drawings that the spring 95 normally holds vBo the sleeve 9() in itsoute'r position with its 'r beveled end disengaged from the ann 88 but when pressure is exerted upon-the nut"'91 to turn the samebrickward the sleeve -Will-be rotated,which. action will cause it to more 85 1 inward as the Wall of the 'cam slot contacts with thepin 94:. This inward niovementof the sleeve dis-engages the pawls 86 and 89 4 from ith/e ratchet 'wheel 85 as before described so that when the :end wall of the, cam slot -abuts-against the pin, the shaft Si will be rotated with the sleeve. W hen the nut 91 is released the spring 95 forces the sleeve 90 outward to its normalposition and` thus releases the pawls 86 and 89 Yandiallows them to .again'cngage the ratchet f i' I The loweror 'pressure roller 83. is simply intended to holdv the paper strip firmly against the roller-82 and is moimted in piv- A oted support-ing arnis`9'.". These arms are 100 suitably pivoted on the opposite sides of the main frame and are normally forced upward by bow springs 98 mounted on the same and engaging rigid pins 99 mounted on the main frame. The shaft 9G is provided with 105` two pendent pivoted links 101') which are formed at their lower ends with elongated slots 101 and provided rfit-lrpins 102. A rock shaft 103 extends through the slots 101 and is provided with operating noses 104 110 which :are adapted to engage the'pins 102. wWhen the shaft is rocked my :in operating handle 10.3 fast. to one end o! the. saine the noses 101 force the pins 102 ;la\.\-n\vard and thus 'also draw the links 10U downward 115 which disengages the roller 83 from the roller 82 and permits of tht` paper strip bc'- ing inserted between the rollers or moved forward or backward' at will.

.ks the operation of the platen yoke 71'120 and the other devices cooperating therewith is'dependent upon the operation of bars 7l* I provide means for tbrowing'said ba'rs out of operative positions whereby the 4machine may be operated without the printing devices beingaciniated. This means comprises a rock lsift 106: suitably journaled inuthe mainframe and provided with two 1077 which, when'saidshaft is rocked7n` gage the respective bars'l and 'l-oree tired-3G same forward to disengage the hooks 72' .from the pins 73. f After this disengagement ,l vided with a thumb knob 109 whereby it may be rocked to operate the cams as before described. It will be observed that each of the .cams 107 is formed with a latside so that when it is turned into operative position this flat side will engage its respective bar 71a and thus hold it in inoperative position. lVhen the parts are thus adjusted the ,bars 71 are held against any accidental longitudinal movement by a rod 73 which is engaged by the .walls of notches 73 formed in said bars.

The supply roller 81 for the strip is mounted on a short transverse shaft 110 which is supported by stationary arms 111 mounted on a rigid shaft 112.- This latter shaft supports a pivoted tensin plate,113 which is normally forced forward to engage the paper roll by a coil spring 114 mounted on the shaft 112 and having its oppositeends engaged with said plate and one of the' arms 111.

The paper strip 80 after being `fed through therollers 82 and 83 passes forward between the platen and an inking ribbon 115 better shown in Figs. 1 and 9. This ribbon passes over guiding rollers 116 and about winding spools 11.. Each of the spools 117 is actuated in the same manner and I will thcreforevdescribe one only as this description will suffice for both. Each spool is journaled upon one of two vertically inclined studs 117a fast to brackets 118 mounted on the main frameivhereby the spools are held in position by gravity.

Each stud-is provided with a. rigid sleeve 117b the office of which is to engage a bow tension spring 117c through which it-,passes and thus create Sufficient friction 4t this point to Aretard the-rotation of said ring and a ratchet wheel 119 journaled orsid stud and.. against which said spring rs. (See Fig. 27). The spool is caused t ro- 'tate with the wheel 119 by a stud 119 55 mounted'on said wheel and projecting into a suitable`aperture in said spool. Each ratchet wheel 119 is arranged to receive motion from an operating pawl 120. This pawl is pivotally mounted upon a lcam lever 121 which is journaled upon the journal stud 117. A retaining pawl 122 is pivotally mounted on the bracket 118 and engages the wheel 119 for locking' the same against retrograde movement. The two pawls .120 and 122 are connected below their pivot points by a coil spring 123` soA that their normal tendency is to engage the teeth of the wheel 119. This tendency however is counteracted by .a stronger coil spring 124 which connects the levers 121 of the respective spools so as to draw them together and thus force the fiat end of -each pawl 121 against the dat end of its locking paw] 122. The lower corners of these pawls 120 and 122"y of course come together first, but as the tension of thel spring 1'24 isl much greater than that of the springs 123 the pawls 4are turned `on their plvots until their fiat ends lie snugly together with theiroperating ends out of engagement with their ratchet wheels.'

Movably mounted upon the platen yoke 71 is an operatingjslide 125 having lugs 126 located near its opposite ends, and adapted to coperate with the respective cam levers 121, (see Figs. 9 and 10) upon the operation of vthe platen yoke as before described. Vhen one of the lugs 126 is in positionto strike its respective lever 121 upon the operation of the yoke 71 the remaining lugvis out of such operative position. The slide is shifted longitudinally to bring either' one -or the other-of the lugs into operative position by a thumb knob 127 mounted thereon. When one of the lu s 126 strikes one of the `levers 121 it cams t e same to one side against the tension of the spring 124. This action disengages the fiat ends of the pawls 120 and 122 and permits them to engage their ratchet wheel so that when the lever 121 is released and drawn forward by the spring 124 said pawl 120 will turn the ratchet wheel while the paw] 122 retains the same. The pawl 122 engages the ratchet wheel just as soon as the pawl 120 starts its retrograde movement and does not disengage from the same until said latter paw] again returns to its normal position. By this structure the pawls 120 and 122 are normally out of engagement ,with their ratchet wheels so that the slide 125 may be shifted to cause the ribbon to travel in either direc` tion without said pawls acting to hold eitherof the ribbon spools against the necessary retrograde movement.

In the above described devices means has been provided for moving the printing segments 8 to print numerals from one to nine according to thekey operated but as it is also desirable to print the zero indication..

ence to the zero indication. In order' to ef The frame 23 is provided with a series of pivotedl pawls 129, (see Fig. 8) one for each .of the bars 25, vand eacho'l l'said pawls is provided with a notched cross bar 130. .TheJ

notchedrportions of these barsoverlap from y right to" left so that, if, say :the pawl 129 of the third Abank israised all .the pawls to the right of'the'same would also be raised While the pawl to the left would remain in their normal positions as better shown in Fig. 20. The raising of the pawl 126a of any particular bank will cause its/pin 127L to raise the cross bar 130 of its particular pawl 129.

When one `of the pawls 129 is raised as abovedescribed its cross bar is brought into alinement with a shoulder 131 formed on its re spective bar 7 so that when the frame 23 carrying the pawl is moved longitudinally the cross bar wilf contact vwith the shoulder andmove the bar 7 just far enough to bring the zero type on its respective segment 8 to printing position.-

In order to properly aline the bars 7 after they. have been operated I provide a pivoted yoke 132, mounted on the main frame and normally drawn down i-y a coil spring 133. This, yoke is 'arranged to engage the Iteeth of Arack arms 134 mounted on the bars 7. The said yoke is provided at each end with an operating cam lever 135; said levers beingadapted to be engaged and depressed by extending .under the same and also under vpins 136 mounted on the forward supports 2 6, when said supports are moved rearward (see Figs. 2 and 22). The yoke when operated in' the above manner engages the teeth of the rack arms 134 which are pendentv from-the bars 7 and thus alines the bars.

As a precautiorl against the overthrow of saidbars 7^`t` a greater extent than can be corrected by the alinin device each ofthe said bars is provided with a retainin pawl 137`better shown in Fig. 13. Each o these i' pawls is -pivotally 'mounted upon' a yoke plate 138'secured to its respective bar 7 and the: companion bar 25`and up beside said latter .bar tobringthe pawl into the proper position toiengage arack .139 fast to the. latter 'gagefthe'ri -d cross bar 37 of the main iframe and t us hold said pawls out of enbar. When the `hars 7 are in normal position the pendent. ends of 'the pawls 137 engagement with the racks 139. But when one of the bars 7 moved rearward its pawl 137 disengages from the bar so that a spring 141which connects the pawl to the main frame will cause it to engage its rack 139 and thus prevent any overthrow of the bar. IV hen so engaged the frame 23 and the operated bar 7 are lirmly locked together.

Having thus described the devices for irnparting-graduated movements to the bars 7 and commnnicating these movements to the printing devices to print a detail of eachA transaction I will now passon to; the description of the means forcommunicating the movements of said bars to vthe counter. This means is the same foreach bank, and I will therefore describe the same in connecltionvvith one bank only asfthi'sdescription will suffice for all the remaining banks. Each of the bars 7 is providedat its rea'l` end with a stud 142 which projects into an elongated slot 143 formed .in a link 144 (see Figs. 2 and 15). This link is formed with a. vertical notch 145 and is pivotally connected at its forward end to an operating lever 146. This lever is journaled upon a transverse shaft 147 and is provided as shown in Figs. A5 and 21 with'an operating lstud v148 which projects through an elongated slot 149 formed 'in itsrespective segmental rack 9 which latter is also journaled onthe shaftl 147. The said rack is further provided with angular guiding fingers 15() the ollice of which fis .to support and guide a slidable transfer plate 151-beside said rack segment. This transfer plateis'jformedvvith a diagovnal slot 152 for thefrece tion of the stud4 148 and is further- With;,a .stud 153; a coil springx154 connecting said-studs so as to normally hold the slide finto'. itiupper posito'n; The fslotv 'and pin 'connection Y 142 and 143 bet'fweenfthe'bar-and the link 144 per- 'mits of the bar making-,its initialmovement actuate the rack segmentaccordin'g to the 1.10

degree of movement' of the `aforesaid bar. As the-lever- 146 rocks rearward itelevates the .forward v`end of the link 144 so thata pin 155 mounted on the bar 7 lwill enter the slot 145 andlock the link and bar together so that they will move simultaneously;inde-v pendently of their slot and pin connection. lhen the bar 7 approaches the end^of itsstroke anose 142a on the link 144 strikes a' cross bar 144 of the main framev and thus arrests the link --and segmental -Iack connected thereto before the movement of the bar-'Ihas ceased. During the aforesaid rear# ward movement ofthe lever 146 the pin 148 has been in engagement with the rear end of the slot 149 so that when said lever ceases to move the rack 9 may be given an extra independent movement, during which the nin will plav through the slot without moving the lever. This extra transferring mf'ivement of the rack 9 is in the f olruegos:

vlowing'in 'ar/iner. It will be observed that --the connection between the rack 9 and the slide 151`is such that the two must move together laterallv. lVhen the lever 146 is station ary the pin 148 acts as a fixed fulcrum *so that if the slide 151 is depressed the incline-walls of lits slot 152 vwill engage said pin andtthus force lthe slide laterally rearward which movement will carrv the rack STL rearward the same distanceand thus elfect 'the transfer.. {The slide is depressed to ac? oo rnplishf this` result throughthe medium of ya segmental flange 156 formed on the upper `end'of the same. The flange is engaged and depressed by av pivoted transferpawl 157 hereinafter morejfully-described.

Eaghl of the' segmental racks 9'is ladapted to'engage and operate alcounter pinion 158 fast to azjcounterhwheel '159. The engage-j `.ment of the racks'a'ndpinion is onlyvduring rheuma that the,f9rmfar amovinein 'one directionand to aCC'-Qfepl'sh. this sngage ment and. disengagementifthef. -followinmechanism is employed: llsbe'fore state the segmental racks 9 are'mounted up'O'na the levers '160 is formed at Iits forward'end with' a yoke 162 and eachofsaid yokescooperates with two camsf163 and 164 mou-nted on a rockjshaft 165A vFigs.2 and 25). f ihe'ntheshaftlv is moving in one direction the' cams 163 are actuating the-levers 16d-'and when said 'shaft is moving in' an vopposite direction the cams 164 are inopera- Stive" connection withssaid levers.` To effect 'I this result the shaft 165 must be lmoved longitudinally during eachoperation-of the '.rnrachine.` This longitudinal movement is' accomplished by cams 166 mounted near the opposite ends of said shaft and arranged to coperate with bevel faced ,lugs 167 formed on the side platesof the frame, (seeFig.

Q6)` Y It will bebbserved by reference to said figure that when the operating face of one of the cams 166 is engaging its lug 167 the face 'of the remainingcam is in a diametrically opposite Dosition. This arrangement causes the'shiting of the shaft 165 to be effected` at its final' rotary movement in either direction. .It will be seen from the above descriptionA that upon each oscillation of the shaft 165 the rack segments will be moved into mesh with the counter pinions before thev are moved rearward and out of such mesh before their forward move-t ment is commenced.

' T-he sha-ft 165 receives its rocking or osoperati 15g shaft.

cilla'ting motion throughthe medium of a its shifted positions or when the gear 169 i9 moved latenally.

As it is sometimes desirable to operate the machine -in connection .with the printer without operating the. count-er lprovide mechanism for disengaging t-he gear 169 from the driving shaft 39 upon which it is mounted. To effect this result the gear 169 is provided with a sleeve 170 which is formed at one end upon diametijically opposite sides with notches 171 into whichiiorinallar project pins -172 fastto the shaftjQ (see Figs. 3

and 4). lVhen in this normal position the sleeve and shaft are coupled together and the movement of the shaft 39 will cause the counter operating. racks to be thrown into andout of mesh Awith the counter pinions as before described: The sleeve' its held in this normal position by a coil spring l173 which -surrounds the shaft 39 and bears with its opposite-endsagainst said sleeve and the aforesaid. arm lVhen itis desired that the counter operating racks remain out of mesh with the counter pinions the sleeve 170 is by. a. coil spring 176 interposed between the upper end of saidl lever andthe main frame.v

Said lower end of. the lever is also provided with laterally projecting pins 177 which bearagainst the side of the gear 169 so that when said lever 174 is operated the gear and sleeve 170 will be shifted laterally to disengage the notches and pins 171 and 172. The lower end of the lever 1'74 when inpthis posi'- tion projects into a slot 169* formed in the gear 169 and thus prevents the latter from accidentally turning (see Fig. 43). The gear 169' is further provided with a pin 169" which bears against the side of the lever 174 and assists in preventing'accidental movement of said gear.. In order to lock the lever 174 against operation after' the movement of thenmchine has commenced I pivot a locking lever 17S upon themainframe in such position that its lower end will be engaged and faced forward by t-'herear bar 24 when the frame 23l is in normal position. The Y upper end of the said lever 178 is formed with a locking nose 179 which when the lever is released by the operation of the frame 23 is drawn forward between the lever 174 and the main frame by a coil spring 180 which connects the lower end of said lever 178 to the main frame. lVhen the nose 179 passes between the lever 174 and the-main .terfwheel audits ratchet havefrnoved 'one' Wheel 159mm by san-gear.-

frame it occupies v4the entire'space between the two and thus prevents any movement of said lever until theframef returns to -its normal position andthebar 24 V'forces the lower endof the leverh.1'78'forward against the tension of its spring. As the lever 1,74is

the'joperations ,of the respectivelracks in'connection with their-pinions andcunter Wheels are similar in each instance I will describe one onlyA 4asvfthis description will sufce for all.v 1- All ofthe counterfwheelsare journaled upon a transverse 'rotary shaft183 and each jof-ithe samefis 'Provided witliga sleeve 184 carryin a ratchet vv'hel 185. This latter wheellwisengagedby a' spring pressed pawl 186'-Iounted 'gon` a ;transverseA rod '187,:1wher`eby'fall retrogradefmvement lof theeounterfwhleel is pre erited.v Theratchet Wheelf 185;'js'- '1"1'J rovided v ith "-jlaterally proj ctiiigl pins^`188ff` and'f ,18.9 .located upon-'4f opposite 'sidesof the saine.n l'Afterthel coun- .l

complete revolutionvwhioh equals one unit-of thenext'higher'order the pin. 189 engages and raises the forward endJQf Va spring pressed la'tchingv pawl '19d-'Which ipivoted upon a transverse 'shaft '191. Simultaneously with this action the pin 188 engages the lower beveled endiof the transfer pawl Y; `157 and forces the-same rearward so that the uppe'rinotched endvof said pawl will catch ver an arm192 formed on the pawl s 190V when thelatterx-is' alloived to .again assume its-'normal position. Thepawls 157 :and 190 may be .termed `transfer'controlling devices Q-provisions, inasmuch as Athey serve Y to -deterinine whether o r not the'operating.

shall operate. vThe transfer A shown'fin 16 the lpavvl -157iis freei'to devices which actuallyy 4cause the transfer awl is thus held cocked until it isop'eratedito eectfthe transfer as hereinafter,describedi'sVVhen't'hef latching paivl' is ,ini-its v'normal,pos'it'io drawn rearward by 'its 'coil its inoperative position. The' pavvl1.9Qfis"` also in inoperative position as shown injFig'."

'16 and is normally held so by anarm 194 formed on said pawl and depressed by a piv' Y pivoted upon the shaft -191 and is depressed oted yoke 195 (see Fig. 1). This'yoke is y s. link 196 connected thereto and to the shaft 147 (see Fig. W'hen the shaft 147 moves upward upon the initial movement of the machine the yoke 195 is raised and thus releases all thepaivls 190 and allows them to descend to their operative positions. At the inal'movement of the machine the pawls are again elevated by the yoke to inoperative "positions so that any of thetransfer pawls V"that-have been cocked vduringthe operation of vthe machine, will return to normal posi non.

When'one fof the pawls 157 is cocked for transfer" as before described its lower end is so depressedthatQa pin 197 carried thereby will lie inthe path of one of a series of transfer levers-198 (seeFigs. 2 and'), so that when saidleversfareoperated thepavvl will be turned'jonits -pivot .whereby its lower end will engagej'agnd depress its respective l transfer slide151'asjbefore described. These journaled'.upou-.gtheslia-ft 147 and are pro-V vided with'exten'sionfsfoi-{arms 199 which are connected by'"-a'rig'fd 'of said'A le\'ers; `1p'u` 'irfmove simultaneously.

' fhv evers 198 are formed increase froll'lrigl'l't to leftlf'Thelevers 198 and coperatingpartsserve to finally effect the transfersgthat'i@they are the parts which whexrgoperated-'idirectly and 'immer Herent depths which 200 whereby all `diatelyca-usethe transfer. movement yof the hi gher'" ordenA `Wheels fas'fiA 'determined .b v the transfer `controlling provisions "previously,

referredA` to; YThe forward walls of lthese '-loo notches Contact with thelrespective'nns 197,

successively' so as to permita transfer tobe made by #a f transfer; e.f ga' transferffto levers'203. v These levers arejournaled upon the shaft.-161-inearthebpposite ends'of the same" Vand are-1 provided irespectively" v vith anti-frictionrollers 204 f which project into ofcourselv necessitates a transfer to the suc`" 'iceeding'counter wheel,A y inlon Q cam slots Q05 formed in`cam -'disks 20? fast" to the shaft 165.` It'` beseen bv refer-- 'en'ce to'-;Fig. .2- off'the' drawings that. the cam'flslots`l205 -are so s pedthat the levers 203 will onlvbemoved iear the` latter part oftheoperationl of the machine land Willi erations' ofv the racks 9 havej'c'eas'ed.

to revolve thereon in a-'i'or'ward direction. This shaft is formed with alongztudmal groove 207 (see Figs. 3 and') so that As'before stated .all of thecounter ivheels are mounted upon a shaft 183 .and are free When'it is Yrotated the Wall of said groovewillengage pivoted spring p Moveressed pawls l' 208 mounted on 'the respective counter Wheels f Y and thus carry said wheels to zero.

thus ell'ectthe transfer aftertheregular `op '5120i ment is imparted'to the shaft to secure this result through a-pinion 209 fast to the end of the samel as shown in Figs. 1 and 7. This pinion is engaged by a segmental rack 210 5 which is pivotally mounted upon the main frame and is provided with an operating handle 4 vwhereby it may be oscillated to actuate saidfpinion. The -rack is normally drawn forward b v .a coil'spring 212 which connects itkrfwiththe main frame. The said rachis' limited. in; i ts"movements b v a pin 213mountedon-the`main frame and adapt-l ed toormstop for the side bars 214 of said segment. AThese side bars .are also ar '15. ranged to contact withand -operate a crank pin 215`mounted 'on acrank arm 216 whichl latter is fast to arock shaft 217. This shaft ssuitably mountedv in theV counter Aframe and is formed', with a series of -notches'218 corresponding in positioxrwith the"respeeti'vecounter wheels. When the shaft 217 is in its normal-position shown in Fig. 1 the counter wheels .passfreely through the notches 218 but when `the shaft is rocked as before described by the tippin of the'rame 210 the notchesare so moved t at their bottoms forxn'stops fo'rpins`219l mounted on the per'rpheries of, the counter-wheels and thus positively arrest said wheels at the zero .-pontf" The. mechanisms heretofore described cover the means for printinga detail of each amount and registering a tota-l of all the amountsV combined and I will now describe thedevices for printing a grand total of all the amounts registered, which total will correspond. with the Atotal indi' cated on the 'countemwheels Each of `the counter wheels is provided on one'side with '40 Acally oppositepoints.. 23.) Cooperating with these'fpins aretwo curved notched levers 221 which are pivotally mounted upnatransverse shaft 222. The levers arello'cated side byf side so that one of the same-Will vcon tactgilvith the'short pin 219 and the other `'with the long pin 220. The forward '.edsof the levers are held normally elevated-by a. cross .bar 223 which s'mountedat itsppposi vends in arms'224 pivotedom'the 2. -Each of said eriisis pivotallyf'f'eonnected 'to a slidc 225 which #is -guidod-*at its lower end by la pin-226 mounted ;'on:"the main frame and projecting..througha.l slot 227 formed insaid slide. -Qne 'of said slides is also "formed with .a rigid-.arm 228 (see Fig. 3) which-projects into .a notch 'formed ina plun er bar 229 so-s to -move therewith; said ar being operated ashereiafter described. Then the slides-225a'removed1 downward by `the depression of the pllmger 229 the cross bnrf223is also 'moveddowm ward and thus permitsthe leve13i22l-jto asf;-

two pins 219' and 220 located at diametri-- their respective pins' upon the .counter wheels. The positions of said pins therefore govern the movements of said levers so that they move only so far as the value indicated upon the counter warrants.- VVhenf the levers are released they are drawn into the aforesaid positions by coil springs'230 which connect them to an apertured guide plate 231 mounted at its opposite ends upon Y "235' for teach' bar 7.;.-The said graduated levers are pivoted' to their bar 7 at their rear ends andere `forined'at vtlieirfor\\'ai-d 'i 'graduated stair-step shoulders be seen by reference to Figs.' '1.

ends' withA 236. It wil 3 and 23 of the drawings that the gradui. ated shoulders 236 of each pair of levers 235 are all diil'erent distances from the pivot point of said levers and thus'represent-di'fferent values or degrees vof movement of said bar 7 to which they are pivoted. The

shoulders 236, of each' pair of 'levers 235,' it

will also be observed, are'equal in number The arrangement of'said levers 221 is such that when they are allowed to 'ascend at theirrear ends and the long ping220 is in positioxi to intercept them," the levers 235 are arrested in the same plane but as one of said levers projects farther -forward than the other, onel of its shoulders will lie in the path of a. lug 237 on one of the bars 25 of the driving frame. lf the short pin 219 should be in operative position it will arrestv only the inner one of saidv levers 221- and will thus hold the. shorter lever 235 in the path of the lug 237 and allow `the longer lever to drop` belo\v and out 0f the path of said lug. Vhen the frame. 23 is moved Hrear-ward b v theoperationof the handle '5 the lugs 237 will contact with the shoulders 23S-lying intheirpaths and thus move thebars I rearward-'and set the print ing segments according the valuesrepresented bv said shoulders. The above described devices are only .set inoperationof course when it is desired 4tomillt the grand Vtotal of all the amounts registered and are set for operation as before statedbythe des 28.9- intpfwhifeh fled pressed latching pawl 240 mounted on the main frame, is adapted to catch when said plunger is depressed to hold it in` this depressed position. This latch is arranged to be tripped to release the plunger upon the operation of the machine by an angular arm 241 mounted on the frame 23 (see Figs. 3 and 24) and moving in the same plane as that occupied by thel upper end of the pawl.- T he arm 241 is further provided witha flat plate-242 which, after the movement of the machine has commenced, occupies a` posi- .tion under an anti-friction roller 243A mounted on saidx-plunger rod so as to prevent the depression'of the latter at all times except when the machine is in normal position. The plunger rod is further provided at its lower end with an vanti-friction roller 244 which, when the rodis depressed, engages the shoulder 175 of the lever 174 (see Fig. V4) and operates the lever to disconnect the counter as before described; such disconnection being necessary in order to prevent the operation of the counter 'upon the movement of the bars 7 to setthe printer for the total amount. In order to prevent any possible action of the bars '7 because of the operation of any of the keys when the grand 'total is being taken, I provideffor releasing any keys that may be depressed' upon the v.operation of the plunger rod 229. To eect this result I provide a rock shaft 245 (see Fig. '3) having two operating arms 246 which are adapted to engage the key releasing rod 45 and force the same forward. One-of said arms 246 is provided with an extension 247 which projects under the' lower end of the plunger rod 229 whereby when the latter is depressed the said arms are operated and any key which may have been depressed is released. The condition ofthe counter remains undisturbed by the taking of the totalI from it for the printer and thus a. tot-al may be struck off at any time and the addkiltins tothe grand total on the counter s u sequently continue.

By reference to Fig. 2 it will be seen that after the Upaper strip 80 leaves the platen it is carried upward and rearward and allowed to drop down back. of the machine which course exposes its under printed side to the operator: the amount last printed becoming visible after each operation and thus indicating to the operator, his mistakes, if any have occurred. In order to compel a full stroke of the operating handle 5 the same is provided as shownin Figs. 1 and 12 Awith a segmentalratchct plate 251 having tripping pinsv 252 which coact with a tripping arm 253 mounted on a double acting pawl 254. .Thisv-pawl is pivoted upon the main frame and is held in either of its positions under spring pressurel by a spring pressedpawl 255 also mounted on the main frame andengaging anose 256 of the pawl.

254. It will he seen that the pins 252 engage the arm 253 at the opposite ends of the stroke of the lever 5 and thus shift the pawl 254 to permit a reverse movement of the lever in a manner well known in the artA and needing no further explanation.` pin 257 mounted on the main ,frame limits the forward movement of the segment 251.

The foregoing description relates exclusively to the machine in itscapacity of an adding machine but like all adding machines it may be employed also for subtraction, di; vision and multiplication by performing a series of additions As-these operations are well known in'thecart I will only escribe the more common' operation of subtraction.

, In adding machines the operation of 'subtraction 1s performed by adding .a suli-Y A stop ciently large number` to the minuend to complete the vcapacity ofthe machine andA leave the correct remainder @difference-be#- tween the minuend and fsubtrahendr In order to instantly know just .what keys to press tol secure thevproper amount asA men- Y tioned above I have provided each-*ofthe keys, in addition to its large regular nu-l meral, with a small colored numeral to he` used for subtractionfoperations. The .col-

ored numerals read from 0 to 8 and they 'j are arranged in the reverse order fronrthe large numerals, z'. e. from the top down. 'Now for example if' the minuend is 500 and the actual subtrahend 400, the subtrahendv to be placed on the machine will be one lessor l 399. The key containing-,the small numerall 3 in the hundreds bank isdepressed and no keys operated in theztens andunits bank as there are-no ninesl in the small figures. This operation it will be seen is equal to the addition of 600 which together with the 500 would make 1100. A 1

Heretofore 'all the nine keys to the-left of the highest figure of the snbtrahend have been operated in order .to eliminate the amounts carried by transfer to the counter wheels above those containing the minuend but in my present machine I provide for cuttin said nine keys. I effect this result'bya series of keys 2480ne for eachpawi 157 and out the transfer without operatingA pivotally mounted on a transverse shaft 249. (See Figs 1 and 2)! These keys are so arranged that when operated'they will engage pins 250 mounted on their respective pawls and thus force lthe upper ends of said pawls so far forward that their lowcrends-` including the highest numeral of the minuend. 'For example if the minuend is 5000 andthe subtrah'end 50, then the keys for 49 (small numerals)' will be depressed and also 'the keys for 990()A .(largef; numerals)l andb lastly the cut outkey betweenthe thousand' and ten thousand bank. Inftheexample given the keyspressed V"(largef numerals) wouldbe 9950 iw'li'ch added' to-lthe minuend 5000 wouidvrdinariiy result M1495() but ,asv

the transfer above the ighousmd-l bankfhasj been'cut out the remainder of 4950-is shown.

Having .thus described my invention what I claim as new and'de'sire to secure-by'Le'tl ters Patent i's r.

l. In a calculating machine, the combina'-V tionwith' a counter, of a driving member,

driven counter operating members 'having graduatedprojections, a series' of pivoted pawls mounted o n the drivinghmehmber, and

-' afseries of keys for operating'said paw'ls to 'bring them into connection with the gradu-l keys 7 or ,forcing said pa-wls into such en-4 .ated projections. 2.

n a calculating machine, 'Llie' .ombiiia`V tionwithaco'unter, of a movable driving frame constructed to have movements of in- .variable extent, a series of counter operating bars having graduated .projections,`a' series of pivotedpawls, on the movable frame,

,- springsfor normallyfholding'said pawls out of en 'agement with said projections, and

structed to have movements of invariable.

extent, a series of driven counter operating bars having Agraduated projections, a series of connecting devices mounted on the frame, and a series o f keys for operating lsaid con-- necting devices toA eau'se them to move into position toengageand operate the bars.

5. In' aV calculating machine, the combinationvvitli'vlapeounte'r, 'of a movable driving frame'c'o'nstructed to have movements of invariable extents, a series of slidable counter operating bars having graduated projec-V tions, aseries of movable connecting'devices mounted on the frame and` adapted to be brought into' connection witvhrthe graduated:

projections, and keys arranged to engage and operate said connecting devices.

6. .In a calculating machine, the combina-V tion with a countenof z'i` f'iiio'vable driving vframe constructed to'liai'fe'finovements of in variableoextents, a of independent ,counter operating bars lhavinggraduated Jill.'

projections, series of pivoted connecting pawls mounted on the frame and arranged to engage said projections, and keys arranged to force said pawls into engagement ni th.V thev projections. v

7.` In a calculating machine, the combination with a. counter, of a driving member -constructed to have movements of invar` vable extents, a slidable counter operating member 4having graduated projections, a series of pawls mounted on the driving member, and a series ofkeys-foroperating .said pawls-to force them iiitooperative ,re-

lation with said projections.

8. In a calculating machine, thecomlination with a counter, of a driving member having a series ofspacedibars, a series of -driven bars having graduated projections, a`

.series Aof pawls pivoted onthe spaced bars iso as to engage saidgraduated projections and projections which normally-rest upon the-spaced bars, springs'for holding saidmjpavvr--ls in their normal positions, 'and Y keys' for operating said pawl's. y

9 In-a 'calculating machine, the combina- 4tion with a counixir, of a driving member, a

series of -driven-'bars having graduated p r'oi i jections, a series of' paivls pivoted on the driving meii'iber and having lateral projections which Aengagek the graduated projections and a series of keys for operating said paivls,

l0. In av calculating machine, the .combination with a counter, of adriving frame having a series of spaced bars, counter operating bars arranged 4betvveenthe spaced bars and provided with graduated projec tions, connecting pawls mounted onA the spaced bals, and keys for operating said pawls.

1l. In a calculating machine,-the'coiiibination with a counter, of a drivingimember,`

driven counter operating members having graduated projections, a series of movablel connecting devices mounted on the dr`iving member, and a'. series of keys arranged 'to 1 .operatesaid devices.

412. vIna calcul tinginachine, the combination with a counter, Iof a; drivingf frame,

' counterf opera-ting bars arranged to'be operated by said frame, and pivotedfspring pressed pawls arranged to 'automatically couple-the bars to the frame after the moveinent of the liars has commenced.

- 16. In acalculating-macliine, the combination u'itha counter, of a driving member, a driven member, movable devices on the. driving member arranged to be noved into connection with the driven member,V

and a .single spring for normally holdinnr all of tlie connecting devices out of engagev nieiit with the driven member.

1i. In a calculating machine, the combination with a counter, of a movable driving member arranged to receive an invariable 

